﻿<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>关不掉的警告框</title>
    <script type="text/javascript">
        
    </script>
    
</head>
<body>
<input type=button value=单击我 onClick="var e=1;while(1==1){alert('真的关不掉吗!!!')}">
</body>
</html>